Improvement in gauge-cocks



waited tant @wat @titille Letters Patent No. 100,981, dated March 22, 1870.

IMPROVEMENT IN GAUGE-COCKS..

The Schedule referred to in these Letters Patent and making part, of the same.

To all whom it may concern:

Be it known that I, JOHN B. CHRISTOFFEL, of Williamsburg, in the county of .Kings and State of New York, have invented a new and useful Improvemeut in Gauge and Stop-Cocks; and I do hereby `declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being vhad to the accompanying drawings forming partof this specification, in which- .Figure 1 is a longitudinal section of my improved device, taken through the line y y, tig. 1, when arranged for use as a cock. y

Figure 2 is a longitudinal section of the same taken through the line x x, fig. l, when arranged for repacking the valve or piston.

Figure 3- is a detail top view of the saine.

Figure 4' is a detail sectional view of the piston.

My invention has for its object to furnish an improved cock, designed for use as a gauge-cock for steam-boilers and for a stop-cock for reservoirs, in which water, oil, or any Volatile liquid is contained, and which shall be so constructed as to allow thevv valve or piston to be repacked without 'removing the cock or allowingA any of the steam or liquid to es- Cape; all@ It consists in the cock constructed as hereinafter more fully described. v

A'repres'ents the barrel of the cock, the inner end of which is connected with the boiler or reservoir in the ordinary manner.`

The outer end of the barrel A is enlarged, and is slotted horizontally, as shown in fig. 1, the flanges thus formed 'being perforated, as shown in figs. 1, 2, and 3, to receive the conical plug B.

The end of the solid or central part of the said outer end of the barrel A is concaved to fit closely upon the side ofthe plug B.

The plug B is drawn down into and held in its seat' by means of a screw` and washer, as shown in 1i 1.`

gThe upper end of the plug B may have a square projection formed upon it to receive a wrench, for

convenience in turning it, when required.

The plug B is perforated through its middle part, as shown'in figs. 1 and 2, said perforation being upon a line with the cavity1 ofthe barrel A, and having a screw-thread 'out in its inner surface to receive the screw-stem G of the valve or piston D. The side of the' plug B next the end of the barrel A is chambered out, as shown in figs 1 and 2, to receive the piston D, and allow it to be moved forward aud back to close and open the discharge-opening in the end of the barrel A.

The pistou D may be fonned solid upon the end of the stem C, or may be formed separate and connected with it by a piu, or in any other convenient manner.

` r1he tace of the piston has a dovetailed cavity formed in it to receive the rubber, leather, or other suitable packing E.

The face of the piston D has ashort pin, d', formed in its center, which enters and fits into the dischargeoritice of the barrel A, said discharge-orifice or opening being made small for a distance equal to `the length of the pin d', so that when the piston D is l forced forward to its seat, the pin d' may push back any sediment or other obstruction from the dischargef orifice into the enlarged part of the cavity of the barrel A. l

ysolid body ot' the said plugand through the lower i flange of the barrel A, as shown in fig. 1, for the escape of the. steam, water, oil, or other substance for drawing which the cock is used.

Should the valve leak,4 and it become necessary to renew the packing E, the stem C is operated to draw the piston D into the chamber of the plug B, which pl ng is then turned one-quarter around.

This allows the piston to be conveniently repacked, the solid side of the plug B iu the mean time closelyl closing the discharge-opening of the barrel A, as Shown .in g. 2.

The form of the parts may be varried according to the particular use to which the cock is to be applied.

The plug B may be secured in place, when adj usted by the pin G attached to the spring H, which passes around the edge of the tiauge of the barrel A, to which flange the other end of thc said springis securely attached.

Having ythus described my invention,

1 claim as new and desire to secure by Letters Patent- The combination of the barrel A, perforated and chamhered conical plug A1 3, screw-stein O, and piston D d' with each other, substantially as herein shown and described, and for the purpose set forth.

rlhe above specification of my invention signed by me this 19th day of January, 1870.l

JOHN B. OHRISTOFFEL.

Witnesses GEO. W. MABEE, J Aanus T. GRAHAM.

The piston D is moved forward to close the dis- 

